it seems that when i import the template ( .zip) , i don't see the .js on the left of the screen in listbox "CSS a javascript files" . When i try to open "template.js" the builtin .js of limesurvey , it displays nothing!!! why ?

the imported templates are not in the same directory than the builtin template.

i will try to copy directly the .js IN the "limesurvey/templates/CDC_citronade" directory i will see !!

There once was a bug at certain Limesurvey 2 releases causing the template editor to not properly import JS files from ZIP archives.
Update your Limesurvey version and the import should work fine again with all required JS files included.